Not listed THE IBEX TEAM HAS IDENTIFIED A SET OF FUNDAMENTAL AND PRIORITIZED SCIENCE GOALS THAT CAN BE ADDRESSED WITHIN THE TIME FRAME OF THE CONTINUED IBEX EXTENDED MISSION. BECAUSE OF THE FEW-YEAR TIME LAG DUE TO SOLAR WIND AND ENA TRANSPORT IBEX OBSERVED THE SOLAR WIND/ LISM INTERACTION CHARACTERISTIC OF DECLINING PHASE/SOLAR MINIMUM CONDITIONS (FIG. 1); IN THE CONTINUED EXTENDED MISSION IBEX CAPTURES THE RESPONSE OF THE INTERSTELLAR BOUNDARIES TO THE CHANGING STRUCTURE OF THE SOLAR WIND IN ITS TRANSITION TOWARD THE MINI SOLAR MAXIMUM AND POSSIBLY THE DECLINE INTO THE NEXT SOLAR MINIMUM. TOGETHER WITH DATA FROM ACE STEREO AND OTHER ELEMENTS OF THE HELIOPHYSICS SYSTEM OBSERVATORY (HSO) ( II.C) IBEX PROVIDES AN UNPRECEDENTED PICTURE OF THE GLOBAL EVOLUTION OF THE HELIOSPHERE AND ITS INTERACTION WITH THE LISM OVER THE SOLAR CYCLE. THE CONTINUED IBEX EXTENDED MISSION (EM) AFFORDS NEVER TO-BE-REPEATED OPPORTUNITIES TO COORDINATE GLOBAL IMAGING OF THE HELIOSPHERIC BOUNDARY WITH IN-SITU MEASUREMENTS BY THE VOYAGERS AS THEY PASS BEYOND THE HELIOPAUSE AND START TO DIRECTLY SAMPLE THE LISM. THE IBEX SPACECRAFT SUBSYSTEMS AND TWO IMAGERS ARE IN EXCELLENT HEALTH. IN 2011 THE SPACECRAFT WAS PLACED INTO A NEWLY DISCOVERED LONG-TERM STABLE LUNAR-RESONANCE ORBIT THAT SIMPLIFIES OPERATIONS REDUCES RISK AND ENABLES EVEN BETTER IMAGING. OUR IN-GUIDANCE BUDGET FROM THE LAST SE- NIOR REVIEW WAS LESS THAN HALF OF THE PRIME PHASE E FUNDING. NONETHELESS THROUGH CAREFULLY TARGETED REDUCTIONS AND EFFICIENCIES THE IBEX TEAM MANAGED TO CONTINUE TO DELIVER OUTSTANDING SCIENCE. WITH THE FLAT BUDGET GUIDELINES OF THE CURRENT SENIOR REVIEW IBEX IS POISED TO MAKE EVEN MORE FUNDAMENTAL DISCOVERIES WITH EXTREMELY LOW-RISK LOW COST AND HIGH-SCIENCE-RETURN THROUGHOUT ITS CONTINUED EXTENDED MISSION ($120k) 5/3/18 8 THE IBEX TEAM HAS IDENTIFIED A SET OF FUNDAMENTAL AND PRIORITIZED SCIENCE GOALS THAT CAN BE ADDRESSED WITHIN THE TIME FRAME OF THE CONTINUED IBEX EXTENDED MISSION. BECAUSE OF THE FEW-YEAR TIME LAG DUE TO SOLAR WIND AND ENA TRANSPORT, IBEX OBSERVED THE SOLAR WIND/ LISM INTERACTION CHARACTERISTIC OF DECLINING PHASE/SOLAR MINIMUM CONDITIONS (FIG. 1); IN THE CONTINUED EXTENDED MISSION, IBEX CAPTURES THE RESPONSE OF THE INTERSTELLAR BOUNDARIES TO THE CHANGING STRUCTURE OF THE SOLAR WIND IN ITS TRANSITION TOWARD THE MINI SOLAR MAXIMUM AND POSSIBLY THE DECLINE INTO THE NEXT SOLAR MINIMUM. TOGETHER WITH DATA FROM ACE, STEREO, AND OTHER ELEMENTS OF THE HELIOPHYSICS SYSTEM OBSERVATORY (HSO) ( II.C), IBEX PROVIDES AN UNPRECEDENTED PICTURE OF THE GLOBAL EVOLUTION OF THE HELIOSPHERE AND ITS INTERACTION WITH THE LISM OVER THE SOLAR CYCLE. THE CONTINUED IBEX EXTENDED MISSION (EM) AFFORDS NEVER TO-BE-REPEATED OPPORTUNITIES TO COORDINATE GLOBAL IMAGING OF THE HELIOSPHERIC BOUNDARY WITH IN-SITU MEASUREMENTS BY THE VOYAGERS AS THEY PASS BEYOND THE HELIOPAUSE AND START TO DIRECTLY SAMPLE THE LISM. THE IBEX SPACECRAFT SUBSYSTEMS AND TWO IMAGERS ARE IN EXCELLENT HEALTH. IN 2011, THE SPACECRAFT WAS PLACED INTO A NEWLY DISCOVERED LONG-TERM STABLE LUNAR-RESONANCE ORBIT THAT SIMPLIFIES OPERATIONS, REDUCES RISK, AND ENABLES EVEN BETTER IMAGING. OUR IN-GUIDANCE BUDGET FROM THE LAST SE- NIOR REVIEW WAS LESS THAN HALF OF THE PRIME PHASE E FUNDING. NONETHELESS, THROUGH CAREFULLY TARGETED REDUCTIONS AND EFFICIENCIES, THE IBEX TEAM MANAGED TO CONTINUE TO DELIVER OUTSTANDING SCIENCE. WITH THE FLAT BUDGET GUIDELINES OF THE CURRENT SENIOR REVIEW, IBEX IS POISED TO MAKE EVEN MORE FUNDAMENTAL DISCOVERIES WITH EXTREMELY LOW-RISK, LOW COST, AND HIGH-SCIENCE-RETURN THROUGHOUT ITS CONTINUED EXTENDED MISSION Funding Only Action ($120k) 5/3/18 7 THE IBEX TEAM HAS IDENTIFIED A SET OF FUNDAMENTAL AND PRIORITIZED SCIENCE GOALS THAT CAN BE ADDRESSED WITHIN THE TIME FRAME OF THE CONTINUED IBEX EXTENDED MISSION. BECAUSE OF THE FEW-YEAR TIME LAG DUE TO SOLAR WIND AND ENA TRANSPORT, IBEX OBSERVED THE SOLAR WIND/ LISM INTERACTION CHARACTERISTIC OF DECLINING PHASE/SOLAR MINIMUM CONDITIONS (FIG. 1); IN THE CONTINUED EXTENDED MISSION, IBEX CAPTURES THE RESPONSE OF THE INTERSTELLAR BOUNDARIES TO THE CHANGING STRUCTURE OF THE SOLAR WIND IN ITS TRANSITION TOWARD THE MINI SOLAR MAXIMUM AND POSSIBLY THE DECLINE INTO THE NEXT SOLAR MINIMUM. TOGETHER WITH DATA FROM ACE, STEREO, AND OTHER ELEMENTS OF THE HELIOPHYSICS SYSTEM OBSERVATORY (HSO) ( II.C), IBEX PROVIDES AN UNPRECEDENTED PICTURE OF THE GLOBAL EVOLUTION OF THE HELIOSPHERE AND ITS INTERACTION WITH THE LISM OVER THE SOLAR CYCLE. THE CONTINUED IBEX EXTENDED MISSION (EM) AFFORDS NEVER TO-BE-REPEATED OPPORTUNITIES TO COORDINATE GLOBAL IMAGING OF THE HELIOSPHERIC BOUNDARY WITH IN-SITU MEASUREMENTS BY THE VOYAGERS AS THEY PASS BEYOND THE HELIOPAUSE AND START TO DIRECTLY SAMPLE THE LISM. THE IBEX SPACECRAFT SUBSYSTEMS AND TWO IMAGERS ARE IN EXCELLENT HEALTH. IN 2011, THE SPACECRAFT WAS PLACED INTO A NEWLY DISCOVERED LONG-TERM STABLE LUNAR-RESONANCE ORBIT THAT SIMPLIFIES OPERATIONS, REDUCES RISK, AND ENABLES EVEN BETTER IMAGING. OUR IN-GUIDANCE BUDGET FROM THE LAST SE- NIOR REVIEW WAS LESS THAN HALF OF THE PRIME PHASE E FUNDING. NONETHELESS, THROUGH CAREFULLY TARGETED REDUCTIONS AND EFFICIENCIES, THE IBEX TEAM MANAGED TO CONTINUE TO DELIVER OUTSTANDING SCIENCE. WITH THE FLAT BUDGET GUIDELINES OF THE CURRENT SENIOR REVIEW, IBEX IS POISED TO MAKE EVEN MORE FUNDAMENTAL DISCOVERIES WITH EXTREMELY LOW-RISK, LOW COST, AND HIGH-SCIENCE-RETURN THROUGHOUT ITS CONTINUED EXTENDED MISSION Other Administrative Action $0 2/8/18 Not listed THE IBEX TEAM HAS IDENTIFIED A SET OF FUNDAMENTAL AND PRIORITIZED SCIENCE GOALS THAT CAN BE ADDRESSED WITHIN THE TIME FRAME OF THE CONTINUED IBEX EXTENDED MISSION. BECAUSE OF THE FEW-YEAR TIME LAG DUE TO SOLAR WIND AND ENA TRANSPORT IBEX OBSERVED THE SOLAR WIND/ LISM INTERACTION CHARACTERISTIC OF DECLINING PHASE/SOLAR MINIMUM CONDITIONS (FIG. 1); IN THE CONTINUED EXTENDED MISSION IBEX CAPTURES THE RESPONSE OF THE INTERSTELLAR BOUNDARIES TO THE CHANGING STRUCTURE OF THE SOLAR WIND IN ITS TRANSITION TOWARD THE MINI SOLAR MAXIMUM AND POSSIBLY THE DECLINE INTO THE NEXT SOLAR MINIMUM. TOGETHER WITH DATA FROM ACE STEREO AND OTHER ELEMENTS OF THE HELIOPHYSICS SYSTEM OBSERVATORY (HSO) ( II.C) IBEX PROVIDES AN UNPRECEDENTED PICTURE OF THE GLOBAL EVOLUTION OF THE HELIOSPHERE AND ITS INTERACTION WITH THE LISM OVER THE SOLAR CYCLE. THE CONTINUED IBEX EXTENDED MISSION (EM) AFFORDS NEVER TO-BE-REPEATED OPPORTUNITIES TO COORDINATE GLOBAL IMAGING OF THE HELIOSPHERIC BOUNDARY WITH IN-SITU MEASUREMENTS BY THE VOYAGERS AS THEY PASS BEYOND THE HELIOPAUSE AND START TO DIRECTLY SAMPLE THE LISM. THE IBEX SPACECRAFT SUBSYSTEMS AND TWO IMAGERS ARE IN EXCELLENT HEALTH. IN 2011 THE SPACECRAFT WAS PLACED INTO A NEWLY DISCOVERED LONG-TERM STABLE LUNAR-RESONANCE ORBIT THAT SIMPLIFIES OPERATIONS REDUCES RISK AND ENABLES EVEN BETTER IMAGING. OUR IN-GUIDANCE BUDGET FROM THE LAST SE- NIOR REVIEW WAS LESS THAN HALF OF THE PRIME PHASE E FUNDING. NONETHELESS THROUGH CAREFULLY TARGETED REDUCTIONS AND EFFICIENCIES THE IBEX TEAM MANAGED TO CONTINUE TO DELIVER OUTSTANDING SCIENCE. WITH THE FLAT BUDGET GUIDELINES OF THE CURRENT SENIOR REVIEW IBEX IS POISED TO MAKE EVEN MORE FUNDAMENTAL DISCOVERIES WITH EXTREMELY LOW-RISK LOW COST AND HIGH-SCIENCE-RETURN THROUGHOUT ITS CONTINUED EXTENDED MISSION $0 2/8/18 6 THE IBEX TEAM HAS IDENTIFIED A SET OF FUNDAMENTAL AND PRIORITIZED SCIENCE GOALS THAT CAN BE ADDRESSED WITHIN THE TIME FRAME OF THE CONTINUED IBEX EXTENDED MISSION. BECAUSE OF THE FEW-YEAR TIME LAG DUE TO SOLAR WIND AND ENA TRANSPORT, IBEX OBSERVED THE SOLAR WIND/ LISM INTERACTION CHARACTERISTIC OF DECLINING PHASE/SOLAR MINIMUM CONDITIONS (FIG. 1); IN THE CONTINUED EXTENDED MISSION, IBEX CAPTURES THE RESPONSE OF THE INTERSTELLAR BOUNDARIES TO THE CHANGING STRUCTURE OF THE SOLAR WIND IN ITS TRANSITION TOWARD THE MINI SOLAR MAXIMUM AND POSSIBLY THE DECLINE INTO THE NEXT SOLAR MINIMUM. TOGETHER WITH DATA FROM ACE, STEREO, AND OTHER ELEMENTS OF THE HELIOPHYSICS SYSTEM OBSERVATORY (HSO) ( II.C), IBEX PROVIDES AN UNPRECEDENTED PICTURE OF THE GLOBAL EVOLUTION OF THE HELIOSPHERE AND ITS INTERACTION WITH THE LISM OVER THE SOLAR CYCLE. THE CONTINUED IBEX EXTENDED MISSION (EM) AFFORDS NEVER TO-BE-REPEATED OPPORTUNITIES TO COORDINATE GLOBAL IMAGING OF THE HELIOSPHERIC BOUNDARY WITH IN-SITU MEASUREMENTS BY THE VOYAGERS AS THEY PASS BEYOND THE HELIOPAUSE AND START TO DIRECTLY SAMPLE THE LISM. THE IBEX SPACECRAFT SUBSYSTEMS AND TWO IMAGERS ARE IN EXCELLENT HEALTH. IN 2011, THE SPACECRAFT WAS PLACED INTO A NEWLY DISCOVERED LONG-TERM STABLE LUNAR-RESONANCE ORBIT THAT SIMPLIFIES OPERATIONS, REDUCES RISK, AND ENABLES EVEN BETTER IMAGING. OUR IN-GUIDANCE BUDGET FROM THE LAST SE- NIOR REVIEW WAS LESS THAN HALF OF THE PRIME PHASE E FUNDING. NONETHELESS, THROUGH CAREFULLY TARGETED REDUCTIONS AND EFFICIENCIES, THE IBEX TEAM MANAGED TO CONTINUE TO DELIVER OUTSTANDING SCIENCE. WITH THE FLAT BUDGET GUIDELINES OF THE CURRENT SENIOR REVIEW, IBEX IS POISED TO MAKE EVEN MORE FUNDAMENTAL DISCOVERIES WITH EXTREMELY LOW-RISK, LOW COST, AND HIGH-SCIENCE-RETURN THROUGHOUT ITS CONTINUED EXTENDED MISSION Other Administrative Action $0 11/15/17